CN105504498A - Injection molding grade polypropylene microcellular foam composite material and preparation method thereof - Google Patents

Injection molding grade polypropylene microcellular foam composite material and preparation method thereof Download PDF

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CN105504498A
CN105504498A CN201511019885.0A CN201511019885A CN105504498A CN 105504498 A CN105504498 A CN 105504498A CN 201511019885 A CN201511019885 A CN 201511019885A CN 105504498 A CN105504498 A CN 105504498A
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composite material
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polypropylene
foam composite
microporous foam
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CN105504498B (en
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殷嘉兴
赵丽萍
张祥福
周文
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Shanghai Pret Composites Co Ltd
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Shanghai Pret Composites Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10Homopolymers or copolymers of propene
    • C08L23/12Polypropene
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/06Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
    • C08J9/08Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing carbon dioxide
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2203/00Foams characterized by the expanding agent
    • C08J2203/02CO2-releasing, e.g. NaHCO3 and citric acid
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/10Homopolymers or copolymers of propene
    • C08J2323/12Polypropene
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/04Homopolymers or copolymers of ethene
    • C08J2423/06Polyethene
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00Polymer mixtures characterised by other features
    • C08L2205/02Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00Polymer mixtures characterised by other features
    • C08L2205/03Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend

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  • Polymers & Plastics (AREA)
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  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
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  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention discloses an injection molding grade polypropylene microcellular foam composite material and a preparation method thereof. The preparation method comprises the step of carrying out microcellular injection molding foaming with an injection molding machine after uniformly mixing 90-99.9wt% of polypropylene composite material with 0.1-10wt% of foaming agent, wherein the polypropylene composite material is prepared from the following raw materials by weight percent: 42-95% of conventional polypropylene, 0.1-15% of micro-crosslinked polypropylene, 0.1-10% of polyethylene, 0.1-25% of talcum powder filler, 0.1-15% of toughening agent, 0.1-5% of antioxidant and 0-3% of other aids; the foaming agent is modified sodium bicarbonate. The polypropylene composite material has higher melt strength. The polypropylene microcellular foam material prepared from the polypropylene composite material is fine and uniform in pores, well maintains the original mechanical properties of the materials and also takes modified sodium bicarbonate as the foaming agent, thus preventing the obtained product from producing unpleasant odor.

Description

A kind of injection grade polypropylene microporous foam composite material and preparation method thereof
Technical field
The present invention relates to a kind of injection grade polypropylene microporous foam composite material and preparation method thereof, improve foam structure more specifically by the micro-crosslinked polypropylene of interpolation and polyethylene, adopt sodium bicarbonate and stearic composite foamable agent to suppress the polypropylene microporous foam composite material of smell.Can be used for automobile interior exterior decorating fittings, household electrical appliance and wrapping material, belong to processing of high molecular material and technical field of modification.
Background technology
Polypropylene (PP) has the advantages such as the transparency is good, quality light, good heat resistance, price are low, nontoxic, good corrosion resistance, electrical insulating property are excellent, processibility is good, in addition, higher degree of crystallinity makes its yield strength, tensile strength, surface hardness and Young's modulus all more excellent, and has outstanding environmental stress crack resistance and wear resistance.Based on above advantage, polypropylene has a wide range of applications in automotive industry, household electrical appliance, electronics, packaging, building materials and furniture etc.
Along with the development of society, the progress of science and technology, loss of weight falls this this theory and is rooted in the hearts of the people gradually.And polymeric foamable material passes into a certain amount of gas in polymeric matrix, the density of goods is reduced, thus loss of weight can be reached, fall this object, there is the advantages such as quality is light, heat insulation, sound insulation, specific tenacity is high, price is low simultaneously, therefore, polymeric foamable material is subject to researchist and pays close attention to widely.In view of the many merits of PP, PP foam material has been considered to the foam material having more using value and market potential after polystyrene, urethane, polyethylene foam material.Meanwhile, the application of PP in automotive industry in recent years increases gradually, and the research of PP microporous foam is significant for automobile lightweight.But, common PP belongs to linear crystalline polymer, after its melting, viscosity declines rapidly, particularly extensional viscosity, can discharge a large amount of heat of crystallization in crystallisation process simultaneously, PP melt viscosity and intensity are declined further, when causing PP to foam, cell wall is easy to break, it is external that gas in abscess can escape into rapidly polymer-based carbon, causes abscess to subside, so that be difficult to form excellent foam structure.Therefore, in order to obtain high-quality PP microcellular foam material, must to its modification to improve its melt strength.
Summary of the invention
The object of this invention is to provide a kind of injection grade polypropylene microporous foam composite material and preparation method thereof, to solve the deficiencies in the prior art part.
The object of the invention is to be achieved through the following technical solutions:
A kind of injection grade polypropylene microporous foam composite material, by weight percentage, its composition and proportioning are:
Polypropylene composite material 90 ~ 99.9%,
Whipping agent 0.1 ~ 10%,
Wherein, described polypropylene composite material forms by the preparation of raw material of following weight percent:
Conventional polypropylene 42 ~ 95%,
Micro-crosslinked polypropylene 0.1 ~ 15%,
Polyethylene 0.1 ~ 10%,
Talcum powder 0.1 ~ 25%,
Toughner 0.1 ~ 15%,
Oxidation inhibitor 0.1 ~ 5%,
Other auxiliary agents 0 ~ 3%.
Described whipping agent is the composite foamable agent that sodium bicarbonate and stearic acid are prepared, commercially.
Described conventional polypropylene is 230 DEG C, under the test condition of 2.16kg, and the Co-polypropylene of melting index between 1 ~ 100g/10min.
Described micro-crosslinked polypropylene, at 230 DEG C, under the test condition of 2.16kg, melting index is between 0.5 ~ 5g/10min.
Described polyethylene is high density polyethylene(HDPE), and at 190 DEG C, under the test condition of 2.16kg, melting index, between 1 ~ 30g/10min, is preferably between 5 ~ 20g/10min.
Its particle diameter of described talcum powder is less than 20 microns, preferably between 1 ~ 10 micron.
Described toughner is ethylene/octene POE, and at 190 DEG C, under the test condition of 2.16kg, melting index is between 0.5 ~ 30g/10min, and density is at 0.86 ~ 0.92g/cm 3between.
Described oxidation inhibitor comprises primary antioxidant and auxiliary antioxidant, and primary antioxidant is hindered phenol or sulphur ester antioxidant; Auxiliary anti-oxidant is phosphorite kind antioxidant.
Described primary antioxidant is 3, one or more in 5-di-tert-butyl-4-hydroxyl benzyl diethyl phosphoric acid (3114), four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol esters (1010) and thio-2 acid octadecyl ester (DSTP); Described auxiliary anti-oxidant is diphosphorous acid tetramethylolmethane distearyl alcohol ester (618) or three (2,4-di-tert-butyl-phenyl) phosphorous acid ester (168).
The preparation method of above-mentioned injection grade polypropylene microporous foam composite material, its step is as follows:
(1) ratio according to claim 1 takes conventional polypropylene, micro-crosslinked polypropylene, polyethylene, talcum powder, toughner, oxidation inhibitor and other auxiliary agents, and mixes 2 ~ 5min in high-speed mixer.
(2) mixture uniform in step (1) is added in twin screw extruder, carry out melt extruding granulation, forcing machine each section of temperature is as follows: 190 ~ 200 DEG C, a district, two 210 ~ 220 DEG C, districts, three 210 ~ 220 DEG C, districts, four 210 ~ 220 DEG C, districts, five 215 ~ 225 DEG C, districts, six 215 ~ 225 DEG C, districts, seven 215 ~ 225 DEG C, districts, head temperature 210 ~ 220C, pressure 12 ~ 18MPa, material stops 1 ~ 2min in an extruder.
(3) after the polypropylene composite material of 90 ~ 99.9wt% being mixed with the whipping agent of 0.1 ~ 10wt%, adopt twice-die-opening technology, micropore injection moulding foaming is carried out by injection moulding machine, injection moulding machine each section of temperature is as follows: 170 ~ 180 DEG C, a district, two 200 ~ 210 DEG C, districts, three 210 ~ 220 DEG C, districts, four 200 ~ 210 DEG C, districts, five 170 ~ 180 DEG C, districts.
The present invention by adding micro-crosslinked polypropylene and polyethylene improves polyacrylic melt strength and foam performance, thus improves foam structure, simultaneously with sodium bicarbonate and stearic mixture for whipping agent, avoid resulting product and produce bad smell.
Embodiment
The present invention is further elaborated by preferred version below, but these embodiments are only to illustrate, do not make scope of the present invention and defining.
In the composite-material formula of embodiment and comparative example, the Co-polypropylene that conventional polypropylene used provides for SK Chemical of Korea S, trade names are BX3920.Micro-crosslinked polypropylene is provided by Borealis, and trade names are WB140HMS.High density polyethylene(HDPE) is provided by Fujian refinery, trade names HDPE8008.Toughner POE is provided by Mitsui Chemicals, and trade names are DF8200.Primary antioxidant for BASF provide 3114, the DSTP that trade names provide for Irganox3114 and ICE company of Britain, trade names are NegonoxDSTP.Auxiliary antioxidant for BASF provide 168, trade names are Igrafos168.Modification sodium bicarbonate class whipping agent is provided by the upper outstanding person of Shanghai outstanding person, and trade names are PP2158S.
Embodiment 1
By 61.4 parts of conventional polypropylene, 2 parts of micro-crosslinked polypropylenes, 4 parts of high density polyethylene(HDPE)s, 20 part of 10000 order talcum powder, 12 parts of toughner POE, 0.15 part of antioxidant 3114, mixing 2 ~ 5min in 0.15 part of DSTP and 0.3 part of 168 input high-speed mixer, to be mixed evenly after, mixture is added in twin screw extruder, carry out melt extruding granulation, forcing machine each section of temperature is as follows: 190 ~ 200 DEG C, a district, two 210 ~ 220 DEG C, districts, three 210 ~ 220 DEG C, districts, four 210 ~ 220 DEG C, districts, five 215 ~ 225 DEG C, districts, six 215 ~ 225 DEG C, districts, seven 215 ~ 225 DEG C, districts, head temperature 210 ~ 220 DEG C, pressure 12 ~ 18MPa, material stops 1 ~ 2min in an extruder.The polypropylene composite material that obtained melt strength is higher thus.
After 98 parts of polypropylene composite material are mixed with 2 parts of composite foamable agents, adopt twice-die-opening technology, micropore injection moulding foaming is carried out by injection moulding machine, injection moulding machine each section of temperature is as follows: 170 ~ 180 DEG C, a district, two 200 ~ 210 DEG C, districts, three 210 ~ 220 DEG C, districts, four 200 ~ 210 DEG C, districts, five 170 ~ 180 DEG C, districts.Obtained polypropylene microporous foam material thus.
Embodiment 2
By 59.4 parts of conventional polypropylene, 4 parts of micro-crosslinked polypropylenes, 4 parts of high density polyethylene(HDPE)s, 20 part of 10000 order talcum powder, 12 parts of toughner POE, 0.15 part of antioxidant 3114, mixing 2 ~ 5min in 0.15 part of DSTP and 0.3 part of 168 input high-speed mixer, to be mixed evenly after, mixture is added in twin screw extruder, carry out melt extruding granulation, forcing machine each section of temperature is as follows: 190 ~ 200 DEG C, a district, two 210 ~ 220 DEG C, districts, three 210 ~ 220 DEG C, districts, four 210 ~ 220 DEG C, districts, five 215 ~ 225 DEG C, districts, six 215 ~ 225 DEG C, districts, seven 215 ~ 225 DEG C, districts, head temperature 210 ~ 220 DEG C, pressure 12 ~ 18MPa, material stops 1 ~ 2min in an extruder.The polypropylene composite material that obtained melt strength is higher thus.
After 98 parts of polypropylene composite material are mixed with 2 parts of composite foamable agents, adopt twice-die-opening technology, micropore injection moulding foaming is carried out by injection moulding machine, injection moulding machine each section of temperature is as follows: 170 ~ 180 DEG C, a district, two 200 ~ 210 DEG C, districts, three 210 ~ 220 DEG C, districts, four 200 ~ 210 DEG C, districts, five 170 ~ 180 DEG C, districts.Obtained polypropylene microporous foam material thus.
Embodiment 3
By 57.4 parts of conventional polypropylene, 6 parts of micro-crosslinked polypropylenes, 4 parts of high density polyethylene(HDPE)s, 20 part of 10000 order talcum powder, 12 parts of toughner POE, 0.15 part of antioxidant 3114, mixing 2 ~ 5min in 0.15 part of DSTP and 0.3 part of 168 input high-speed mixer, to be mixed evenly after, mixture is added in twin screw extruder, carry out melt extruding granulation, forcing machine each section of temperature is as follows: 190 ~ 200 DEG C, a district, two 210 ~ 220 DEG C, districts, three 210 ~ 220 DEG C, districts, four 210 ~ 220 DEG C, districts, five 215 ~ 225 DEG C, districts, six 215 ~ 225 DEG C, districts, seven 215 ~ 225 DEG C, districts, head temperature 210 ~ 220 DEG C, pressure 12 ~ 18MPa, material stops 1 ~ 2min in an extruder.The polypropylene composite material that obtained melt strength is higher thus.
After 98 parts of polypropylene composite material are mixed with 2 parts of composite foamable agents, adopt twice-die-opening technology, micropore injection moulding foaming is carried out by injection moulding machine, injection moulding machine each section of temperature is as follows: 170 ~ 180 DEG C, a district, two 200 ~ 210 DEG C, districts, three 210 ~ 220 DEG C, districts, four 200 ~ 210 DEG C, districts, five 170 ~ 180 DEG C, districts.Obtained polypropylene microporous foam material thus.
Embodiment 4
By 55.4 parts of conventional polypropylene, 8 parts of micro-crosslinked polypropylenes, 4 parts of high density polyethylene(HDPE)s, 20 part of 10000 order talcum powder, 12 parts of toughner POE, 0.15 part of antioxidant 3114, mixing 2 ~ 5min in 0.15 part of DSTP and 0.3 part of 168 input high-speed mixer, to be mixed evenly after, mixture is added in twin screw extruder, carry out melt extruding granulation, forcing machine each section of temperature is as follows: 190 ~ 200 DEG C, a district, two 210 ~ 220 DEG C, districts, three 210 ~ 220 DEG C, districts, four 210 ~ 220 DEG C, districts, five 215 ~ 225 DEG C, districts, six 215 ~ 225 DEG C, districts, seven 215 ~ 225 DEG C, districts, head temperature 210 ~ 220 DEG C, pressure 12 ~ 18MPa, material stops 1 ~ 2min in an extruder.The polypropylene composite material that obtained melt strength is higher thus.
After 98 parts of polypropylene composite material are mixed with 2 parts of composite foamable agents, adopt twice-die-opening technology, micropore injection moulding foaming is carried out by injection moulding machine, injection moulding machine each section of temperature is as follows: 170 ~ 180 DEG C, a district, two 200 ~ 210 DEG C, districts, three 210 ~ 220 DEG C, districts, four 200 ~ 210 DEG C, districts, five 170 ~ 180 DEG C, districts.Obtained polypropylene microporous foam material thus.
Embodiment 5
By 53.4 parts of conventional polypropylene, 10 parts of micro-crosslinked polypropylenes, 4 parts of high density polyethylene(HDPE)s, 20 part of 10000 order talcum powder, 12 parts of toughner POE, 0.15 part of antioxidant 3114, mixing 2 ~ 5min in 0.15 part of DSTP and 0.3 part of 168 input high-speed mixer, to be mixed evenly after, mixture is added in twin screw extruder, carry out melt extruding granulation, forcing machine each section of temperature is as follows: 190 ~ 200 DEG C, a district, two 210 ~ 220 DEG C, districts, three 210 ~ 220 DEG C, districts, four 210 ~ 220 DEG C, districts, five 215 ~ 225 DEG C, districts, six 215 ~ 225 DEG C, districts, seven 215 ~ 225 DEG C, districts, head temperature 210 ~ 220 DEG C, pressure 12 ~ 18MPa, material stops 1 ~ 2min in an extruder.The polypropylene composite material that obtained melt strength is higher thus.
After 98 parts of polypropylene composite material are mixed with 2 parts of composite foamable agents, adopt twice-die-opening technology, micropore injection moulding foaming is carried out by injection moulding machine, injection moulding machine each section of temperature is as follows: 170 ~ 180 DEG C, a district, two 200 ~ 210 DEG C, districts, three 210 ~ 220 DEG C, districts, four 200 ~ 210 DEG C, districts, five 170 ~ 180 DEG C, districts.Obtained polypropylene microporous foam material thus.
Comparative example 1
By 67.4 parts of conventional polypropylene, 20 part of 10000 order talcum powder, 12 parts of toughner POE, 0.15 part of antioxidant 3114, mixing 2 ~ 5min in 0.15 part of DSTP and 0.3 part of 168 input high-speed mixer, to be mixed evenly after, mixture is added in twin screw extruder, carry out melt extruding granulation, forcing machine each section of temperature is as follows: 190 ~ 200 DEG C, a district, two 210 ~ 220 DEG C, districts, three 210 ~ 220 DEG C, districts, four 210 ~ 220 DEG C, districts, five 215 ~ 225 DEG C, districts, six 215 ~ 225 DEG C, districts, seven 215 ~ 225 DEG C, districts, head temperature 210 ~ 220 DEG C, pressure 12 ~ 18MPa, material stops 1 ~ 2min in an extruder.The polypropylene composite material that obtained melt strength is higher thus.
After 98 parts of polypropylene composite material are mixed with 2 parts of whipping agents, adopt twice-die-opening technology, micropore injection moulding foaming is carried out by injection moulding machine, injection moulding machine each section of temperature is as follows: 170 ~ 180 DEG C, a district, two 200 ~ 210 DEG C, districts, three 210 ~ 220 DEG C, districts, four 200 ~ 210 DEG C, districts, five 170 ~ 180 DEG C, districts.Obtained polypropylene microporous foam material thus.
Comparative example 2
By 63.4 parts of conventional polypropylene, 4 parts of high density polyethylene(HDPE)s, 20 part of 10000 order talcum powder, 12 parts of toughner POE, 0.15 part of antioxidant 3114, mixing 2 ~ 5min in 0.15 part of DSTP and 0.3 part of 168 input high-speed mixer, to be mixed evenly after, mixture is added in twin screw extruder, carry out melt extruding granulation, forcing machine each section of temperature is as follows: 190 ~ 200 DEG C, a district, two 210 ~ 220 DEG C, districts, three 210 ~ 220 DEG C, districts, four 210 ~ 220 DEG C, districts, five 215 ~ 225 DEG C, districts, six 215 ~ 225 DEG C, districts, seven 215 ~ 225 DEG C, districts, head temperature 210 ~ 220 DEG C, pressure 12 ~ 18MPa, material stops 1 ~ 2min in an extruder.The polypropylene composite material that obtained melt strength is higher thus.
After 98 parts of polypropylene composite material are mixed with 2 parts of whipping agents, adopt twice-die-opening technology, micropore injection moulding foaming is carried out by injection moulding machine, injection moulding machine each section of temperature is as follows: 170 ~ 180 DEG C, a district, two 200 ~ 210 DEG C, districts, three 210 ~ 220 DEG C, districts, four 200 ~ 210 DEG C, districts, five 170 ~ 180 DEG C, districts.Obtained polypropylene microporous foam material thus.
Performance evaluation and the standard of implementation:
In above embodiment and comparative example, guarantee that the apparent density of different sample is identical, to carry out com-parison and analysis to other performances of product by controlling twice-die-opening stroke.
Apparent density is tested according to ISO1183-1; Bending property is tested according to ISO178, and specimen size is 80 × 10 × 4mm, and rate of bending is 2mm/min, and span is 64mm; Simply supported beam notched Izod impact strength is tested by ISO179-1, and specimen size is 80 × 10 × 4mm, and notch depth is 1/3rd of sample thickness.
The test result of embodiment 1 ~ 5 and comparative example 1 ~ 2 products obtained therefrom physical properties is listed in table 1.
Embodiment 1 ~ 5 and comparative example 2 are compared known, along with the increase of micro-crosslinked polypropylene content, the melt strength of polypropylene composite material increases gradually, and microcellular foam material prepared therefrom has less cell diameter, higher shock strength and modulus in flexure.Comparative example 1 and comparative example 2 are compared, what find high density polyethylene(HDPE) adds the object that can realize equally reducing cell diameter, can improve the shock strength of product, but the membership that adds of high density polyethylene(HDPE) reduces modulus in flexure to a certain extent simultaneously.
Present invention obtains that abscess is fine and closely woven, impact property good, modulus in flexure is high and the polypropylene microporous foam composite material of environmental protection, this material can be applicable to the field such as automobile interior exterior decorations, packaging, building.
Table 1 embodiment polypropylene microporous foam material quantitative measurement result
Above embodiment is to better set forth particular content of the present invention; and protection scope of the present invention is not limited thereto; any researchist being familiar with the art all can change easily these embodiments or replace; and ultimate principle of the present invention is applied in other embodiments, and without performing creative labour.Therefore, the protection domain that protection scope of the present invention should define with claim is as the criterion.

Claims (10)

1. an injection grade polypropylene microporous foam composite material, is characterized in that: by weight percentage, and its composition and proportioning are:
Polypropylene composite material 90 ~ 99.9%,
Whipping agent 0.1 ~ 10%,
Wherein, described polypropylene composite material forms by the preparation of raw material of following weight percent:
Conventional polypropylene 42 ~ 95%,
Micro-crosslinked polypropylene 0.1 ~ 15%,
Polyethylene 0.1 ~ 10%,
Talcum powder 0.1 ~ 25%,
Toughner 0.1 ~ 15%,
Oxidation inhibitor 0.1 ~ 5%,
Other auxiliary agents 0 ~ 3%.
2. a kind of injection grade polypropylene microporous foam composite material according to claim 1, is characterized in that: described conventional polypropylene is 230 DEG C, under the test condition of 2.16kg, and the Co-polypropylene of melting index between 1 ~ 100g/10min.
3. a kind of injection grade polypropylene microporous foam composite material according to claim 1, it is characterized in that: described micro-crosslinked polypropylene, at 230 DEG C, under the test condition of 2.16kg, melting index is between 0.5 ~ 5g/10min.
4. a kind of injection grade polypropylene microporous foam composite material according to claim 1, it is characterized in that: described polyethylene is high density polyethylene(HDPE), at 190 DEG C, under the test condition of 2.16kg, melting index is between 1 ~ 30g/10min.
5. a kind of injection grade polypropylene microporous foam composite material according to claim 4, is characterized in that: described polyethylene is at 190 DEG C, and under the test condition of 2.16kg, melting index is between 5 ~ 20g/10min.
6. a kind of injection grade polypropylene microporous foam composite material according to claim 1, is characterized in that: its particle diameter of described talcum powder is less than 20 microns.
7. a kind of injection grade polypropylene microporous foam composite material according to claim 6, is characterized in that: preferably between 1 ~ 10 micron.
8. a kind of injection grade polypropylene microporous foam composite material according to claim 1, it is characterized in that: described toughner is ethylene/octene POE, at 190 DEG C, under the test condition of 2.16kg, melting index is between 0.5 ~ 30g/10min, and density is at 0.86 ~ 0.92g/cm 3between.
9. a kind of injection grade polypropylene microporous foam composite material according to claim 1, it is characterized in that: described oxidation inhibitor comprises primary antioxidant and auxiliary antioxidant, primary antioxidant is hindered phenol or sulphur ester antioxidant; Auxiliary anti-oxidant is phosphorite kind antioxidant.
10. the preparation method of one of any described a kind of injection grade polypropylene microporous foam composite material of claim 1-9, is characterized in that: its step is as follows:
(1) ratio according to claim 1 takes conventional polypropylene, micro-crosslinked polypropylene, polyethylene, talcum powder, toughner, oxidation inhibitor and other auxiliary agents, and mixes 2 ~ 5min in high-speed mixer.
(2) mixture uniform in step (1) is added in twin screw extruder, carry out melt extruding granulation, forcing machine each section of temperature is as follows: 190 ~ 200 DEG C, a district, two 210 ~ 220 DEG C, districts, three 210 ~ 220 DEG C, districts, four 210 ~ 220 DEG C, districts, five 215 ~ 225 DEG C, districts, six 215 ~ 225 DEG C, districts, seven 215 ~ 225 DEG C, districts, head temperature 210 ~ 220 DEG C, pressure 12 ~ 18MPa, material stops 1 ~ 2min in an extruder.
(3) after the polypropylene composite material of 90 ~ 99.9wt% being mixed with the whipping agent of 0.1 ~ 10wt%, adopt twice-die-opening technology, micropore injection moulding foaming is carried out by injection moulding machine, injection moulding machine each section of temperature is as follows: 170 ~ 180 DEG C, a district, two 200 ~ 210 DEG C, districts, three 210 ~ 220 DEG C, districts, four 200 ~ 210 DEG C, districts, five 170 ~ 180 DEG C, districts.
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CN106117814A (en) * 2016-06-23 2016-11-16 浙江普利特新材料有限公司 A kind of automotive upholstery microporous foam PP composite material and preparation method thereof
CN106280006A (en) * 2016-08-30 2017-01-04 江苏百佳斯特汽车制品有限公司 A kind of preparation method of children's seat expanded material
CN106279976A (en) * 2016-08-11 2017-01-04 苏州润佳工程塑料股份有限公司 Fretting map High-strength polypropylene composite material
CN106349565A (en) * 2016-08-30 2017-01-25 江苏百佳斯特汽车制品有限公司 Preparation method of material for child seat headrests
CN107163477A (en) * 2017-05-26 2017-09-15 合肥会通新材料有限公司 One kind can directly be molded chemical micro-foaming polypropylene composite material and preparation method thereof
CN108164914A (en) * 2017-12-26 2018-06-15 浙江普利特新材料有限公司 A kind of fretting map injection ABS composite material and preparation method thereof
CN110054802A (en) * 2019-05-17 2019-07-26 郑州大学 A method of preparing across the scale foam structure material of isotactic polypropylene micro-nano
CN111073103A (en) * 2019-12-13 2020-04-28 天津迪佳新材料科技有限公司 IXPE-containing plastic uptake packaging composite material and preparation method thereof

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106117814A (en) * 2016-06-23 2016-11-16 浙江普利特新材料有限公司 A kind of automotive upholstery microporous foam PP composite material and preparation method thereof
CN106279976A (en) * 2016-08-11 2017-01-04 苏州润佳工程塑料股份有限公司 Fretting map High-strength polypropylene composite material
CN106279976B (en) * 2016-08-11 2019-02-22 苏州润佳工程塑料股份有限公司 Fretting map High-strength polypropylene composite material
CN106280006A (en) * 2016-08-30 2017-01-04 江苏百佳斯特汽车制品有限公司 A kind of preparation method of children's seat expanded material
CN106349565A (en) * 2016-08-30 2017-01-25 江苏百佳斯特汽车制品有限公司 Preparation method of material for child seat headrests
CN107163477A (en) * 2017-05-26 2017-09-15 合肥会通新材料有限公司 One kind can directly be molded chemical micro-foaming polypropylene composite material and preparation method thereof
CN108164914A (en) * 2017-12-26 2018-06-15 浙江普利特新材料有限公司 A kind of fretting map injection ABS composite material and preparation method thereof
CN108164914B (en) * 2017-12-26 2020-12-15 浙江普利特新材料有限公司 Micro-foaming injection molding ABS composite material and preparation method thereof
CN110054802A (en) * 2019-05-17 2019-07-26 郑州大学 A method of preparing across the scale foam structure material of isotactic polypropylene micro-nano
CN111073103A (en) * 2019-12-13 2020-04-28 天津迪佳新材料科技有限公司 IXPE-containing plastic uptake packaging composite material and preparation method thereof

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